• The extended stem of the YFL cryogenic butterfly valve protects the actuator working well;
• The YFL triple offset cryogenic butterfly valve with top entry design makes maintenance online without removed from pipeline to reduce breakdown time;
• Stainless steel or low temperature steel with low temperature treatments and test meet the requirements of cryogenic service and cryogenic working conditions;
• Special maintenance window structure for maintenance and repair;
• Special packing structure suits for low temperature working condition;
• Special seal structure ensures reliable seal under cryogenic condition;
• Casting or forging body and disc with RT testing.

Product range:

• Size: 2"～60" (DN125～1500)
• Pressure rating: Class 150～900 (PN2.5～PN160)
• End connection: Flanged Wafer Lugged BW
• Body materials: LCB/LF2 (-46℃) LC3/LF3 (-101℃) CF8/CF8M/CF3/CF3M (-196℃) etc.
• Disc materials: LCB CF8 CF8M CF3 CF3M etc.
• Stem materials: stainless steel F304 F316 F304L F316L XM-19 420 etc.
• Seat materials: stellite etc.
• Seal ring: 304 316 304L 316L with graphite etc.
• Operation: Bare stem lever gearbox and handwheel electric pneumatic.

Technical standards:

• Design: API609
• Face to Face: ASME B16.10 ISO5752
• BW ends: ASME B16.25 ASME B31.8 EN12627
• Flanged ends: ASME B16.5 ASME B16.47 EN1092
• ISO top flange: ISO5211
• Wall thickness: ASME B16.34
• Test and inspection: API 598
• Fireproof test: API 607 API 6FA
• Pressure and temperature rating: API609 ASME B16.34